//
//  Shape.h
//  工厂模式
//
//  Created by flannery on 2018/12/17.
//  Copyright © 2018年 flannery. All rights reserved.
//

#import <Foundation/Foundation.h>

@protocol Shape <NSObject>
-(void)draw;
@end

@interface Rectangle : NSObject <Shape>
@end


@interface Square : NSObject <Shape>
@end


@interface Circle : NSObject <Shape>
@end
